Grok 4.1 Fast · context window2M

Valid from

2025-11-19

Valid until

still holds

Published

2025-11-19

Recorded by AsOf

2026-11-04

Checked

2026-11-04 · its source page states the value and the date

Confidence

0.95

Sources

“Grok 4.1 Fast , our best tool-calling model with a 2M context window.”— what the page says, read 2026-11-04

• Grok 4.1 Fast and Agent Tools APIprimary · x.ai · 2025-11-19

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